What does a white blinking light mean?

Mine is doing the same thing. Fully charged but wont connect

This has happened to me many times. I received a new headphones from Apple. The second pair shut off randomly. To rid the blinking white light and allow connection I rebooted phone. It worked

According to the following, the white pulsing light indicates that it is ready to be paired: https://www.beatsbydre.com/support/how-to/powerbeats/bluetooth-powerbeats2-wirel ess.html

Means it's ready to pair, in a discoverable state.